EP3321445B1 - Device for applying a film - Google Patents

Description

The invention relates to a hand-operated device for applying a film as a building waterproofing on a particular horizontal roof surface or building surface with a winding of the film carrying, releasably connected in a recording film roll and arranged in the direction of movement behind the film roll pressure roller for transmitting a contact pressure on the the roof surface or the building surface applied film and with a take-up roll for the to be separated from the film before application to the roof surface or building surface protective film.

Flat structural waterproofing is mainly used for roofs, floors, walls and bridges. In this case, rolled-up sealing sheets are usually used. Several, adjacent sealing sheets are glued or welded to form a large-area seal. In multi-layer roof waterproofing followed by vapor barriers insulation followed by Oberlagsbahnen.

The application of film webs on roofs, for example, as a seal, designed in many cases as cumbersome for the laying the film web craftsman. The film roll is usually transported over the roof surface and thereby gradually unrolled by hand and pressed. This is uneven, time consuming, and often depends on the individual skill of the person involved in the transfer.

The DE 44 16 452 A1 relates to a device for full-surface welding of a film, in particular a roof foil, on a base. All necessary for the welding of the film facilities are thus installed on the movable support frame. The bearing device carries the film roll, so that the film web can be uniformly withdrawn from the film roll and applied to the roof surface by means of the guide when the support frame is pulled or moved over the roof surface in a substantially rectilinear motion. The heated in the direction of travel before the guide arranged heating device, the base or to be welded side of the film web. In a further driving movement of the support frame of the corresponding portion of the film web is placed using the guide on the base. The arranged in the direction of travel behind the guide pressure unit then ensures in a further travel movement of the support frame that the film is pressed over its entire width on the base, so that a full-surface welding is ensured.

A generic device is from the US 2010/0 269 981 A1 known, with a film roll carrying a winding of the film and with a pressure roller arranged in the feed direction behind the film roll. A take-up roll picks up the protective film separated from the film prior to application to the roof surface. For this purpose, the rotational movement of a roller is transmitted to the take-up reel by means of two force transmission elements each designed as a belt drive. Due to the increasing in use winding size of the protective film on the take-up roll at a constant speed of the take-up roll at each revolution increases a length corresponding to the respective extent of the winding of the protective film. The take-up roll is small compared to the film roll, so that an undesirable pulling action on the film roll is avoided, however, this leads to a considerable loss in the male protective film, which can not be properly wound up, but wrinkles or even fall into the pressure roller can.

The DE 198 13 625 C1 describes the joining of overlapping roofing sheets by means of a driven vehicle, wherein at least one roofing sheet has a guideline which predetermines the trajectory of the vehicle, which is detected by at least one first sensor during the movement of the vehicle in order to return the vehicle to the path of trajectory predetermined by the guideline.

From the CN 205315020 U a device for applying a self-adhesive waterproof membrane is known. A motor drives a compression roller by means of a belt drive.

From the EP 0 507 714 A1 a device for laying self-adhesive strip with a motor-driven roller is known.

From the DE 94 07 605 U1 An auxiliary device for laying foil webs on roofs is already known. In this case, an unwinding device for roof sheeting with a horizontally movable on the roof carriage and a winding axis for receiving the film roll intended. The car is moved on the roof while unwinding the film web from the film roll.

The DE 194 81 58 U refers to a device for applying flexible sheet materials in thin foil or membrane form to the outer surface of a building's roof. A smoothing roller has a resilient or compliant peripheral surface which pressurizes the web material. The apparatus has a roll material storage means and feeding means for unrolling the material by frictionally engaging a roll with the material and being driven in response to the movement of the roll to feed the material at a rate different from the rate of movement of the roll Car is determined. Furthermore, a smoothing roller is provided which has a resilient peripheral surface to press the material.

From the DE 28 39 443 A1 a device is known in which a film roll is rotatably mounted on a support frame, which must be attached to roof purlins and moved for the laying of the film web, so that the film unrolls.

The DE 196 48 891 C1 refers to a device for laying rolled on film rolls and unrolling during installation film webs on roofs, especially on rafters, with a rotary bearing for rotatably holding the film roll, which is detachably attachable to the roof.

While the cover layers of the structural waterproofing are often laid in conjunction with heating devices with mobile devices, aluminum vapor barrier films can currently only be manually laid on the roof or building surfaces by hand and glued onto the correspondingly prepared substrate manually.

This requires a high workforce and brings problems by weather conditions such as wind and rain. Especially the modern films with a thickness of less than 0.2 mm are very susceptible to wind and can therefore be applied less easily manually.

The invention has for its object to provide a device for easy and reliable application of a film as a backing sheet. This task will solved according to the invention with a device according to the features of claim 1. The further embodiment of the invention can be found in the dependent claims.

According to the invention, therefore, a device is provided in which the take-up roll can be driven to rotate with a variable speed during the advancing movement of the device.

As a result, a fast and reliable application of the film is made possible even in adverse weather conditions by means of the device, the film can be applied flat on the roof or building surface, the protective film removed immediately before contact with the ground and without obstruction of the circulation of the film can be separated.

The essential idea of the invention is that the drive of the take-up roller is not determined as in the prior art by a fixed speed ratio between the film roll and the take-up roll, but rather the speed is controlled by the length of the unwound film. In practice, this leads to a slowing down of the rotational movement with increasing circumference of the winding roller, which is preferably rotationally driven for this purpose with a steadily decreasing speed.

The take-up roll is driven by the feed movement of the device relative to the roof surface or building surface depending on the feed path of the device by a frictional engagement. The rotational movement takes place by a direct frictional engagement between the variable circumference of the film roll and the variable circumference of the take-up roll, which abut each other circumferentially.

Although the device does not require any additional adjusting means for adjusting the rotational movement, it has proven to be particularly advantageous if the device has a clamping device for adjusting, in particular for correcting and increasing the bias of the protective film on the take-up roll, which, if necessary, by means of a friction wheel with the Winding roller can be coupled. A possible sag of the protective film can be compensated by manual control operation and the desired voltage can be restored.

In addition, it has proved to be particularly practical when the device is a movable between a use position and a non-use position support member is provided with a support roller, by which the pressure roller or the take-up roll can be lifted from the building surface. Thus, the unwinding process can be temporarily interrupted regardless of the advancing movement of the device. The support element can be actuated, for example by means of a pedal.

In addition, a modification has proven to be particularly useful in which the take-up roll and / or the film roll is equipped with a turnstile, which prevents unwanted return.

Preferably, the pressure roller has on the circumference an elastic layer, in particular a rubber coating, so that the homogeneous contact pressure force can be transmitted to the film to be applied.

According to the invention, a wrinkle-free bonding of one or more foils to one another and on the roof surface or building surface, for example on trapezoidal sheets, with the advantage that no capillaries are formed at the overlapping sites, in the otherwise moisture could seep in laterally. The fact that the film is glued smooth and tight, no wells arise in which collects water, which can flow poorly and hinder the further roof structure. Laying can be easily performed even in wind, as the film is released in the rolling process of the protective film and adhered directly. Compared to a purely manual installation, the film can be laid much faster by means of the film according to the invention, because the unwinding and the bonding are carried out in one operation. In addition, however, the invention also provides ergonomic advantages, because the user of the device in an ergonomically advantageous, largely upright posture can perform the laying work, at the same time the resulting fast laying speed leads to a relief of the user. By rolling out wound self-adhesive films, long webs of up to 100 m can be laid straight on the roof or building surface. Due to the more precise application with overlap area maintained within narrower tolerances, the degree of material utilization of the film unwound from the film roll increases.

It has already proved to be advantageous to avoid an unwanted manual intervention when the rotational movement of the film roll during unwinding by means of a force transmission element to the take-up reel is transferable. The operation of the device requires in this unclaimed variant, only a single operator, because the protective film can be automatically wound onto the take-up, such as a paper tube and disposed of compressed.

The kinematic coupling can be done by means of a transmission, for example a friction gear. Particularly preferably, the power transmission element has a belt drive with in particular different (large) pulleys, wherein a slipping frictional slip clutch between the film roll and the take-up roll is used to compensate for the occurring during processing, different winding diameter, through which the frictional force is adjustable and This always maintains a necessary winding tension.

However, the winding tension can also be effected by the friction and the slip of the manually pressed take-up roll, as can be realized in a variant without a mechanical kinematic coupling. Without kinematic coupling the take-up roll is achieved by a clever choice of the diameter by friction and slip, that the film is always wrapped with preference and wrinkle-free.

It has already proven to be particularly advantageous if the film roll and / or the take-up roll is rotatably held by means of a releasably fixed to the receptacle axis, which can be fixed axially, for example by means of a clamping or locking bolt. By axial displacement, the axis and thereby also the film or take-up roll can be removed. Essentially, for this purpose, only a corresponding bore for the respective axis is required on the receptacle. Alternatively, the film roll and the take-up roll are designed as a sleeve and are guided by an insertable receiving shaft with fixable flanges.

A further embodiment of the invention, which is also particularly practical, is also achieved in that a cleaning unit comprising at least one cleaning lip is arranged in the feed direction of the device in front of the film roll. The cleaning lip, which is designed, for example, as a rubber lip, prepares the surface to be bonded to the film in order to pretreat it and, in particular, to remove particles and liquids from the surface, resulting in improved adhesion between the substrate and the film. This will increase the carrying capacity of the film and so that the accessibility on the surfaces to be spanned, especially trapezoidal sheets, significantly improved.

In this case, according to a particularly preferred modification, the cleaning unit or at least one cleaning lip is biased by a spring element with a biasing force against the roof surface or the building surface, so that regardless of a force applied by the user feed force of the device is always a sufficient contact pressure of the cleaning lip is guaranteed.

By virtue of the fact that the device has a guide roller delimiting the cleaning unit in the feed direction behind the cleaning unit, the delivery of the cleaning lip relative to the roof surface or the building surface, the cleaning lip is also protected against overloading. In addition, a line-shaped application surface on the roof or building surface is achieved by the guide roller and the pressure roller and ensures a defined orientation of the device relative to the plane of the roof surface or building surface.

Thus, according to the practice-oriented embodiment, in which the pressure roller is arranged behind the film roll in the feed direction of the device, at the same time over the entire width of the film surface, bubble and wrinkle-free installation of the film ensured.

The unrolled from the film roll film is preferably so small compared to the arranged by the pressure roller and the front guide roller or the cleaning lip level surface arranged spaced that the film can be transferred directly to this, so that the pressure roller only the already lying flat film with the additional fixing force applied. For this purpose, the distance of the film roll from the roof surface or the building surface is less than the diameter of the film roll.

The device is handled purely manually, wherein the device is designed to be movable on the roof surface or the building surface by means of a bracket, which can be fixed in particular in different working positions. For this purpose, the bracket is pivotally and fixed by means of at least one releasable locking pin in different, corresponding recesses corresponding to the receptacle angular positions. Of course, the bracket, like all parts of the device, for example, for transport purposes also completely disassembled or removed. All parts are designed so that the assembly takes place without tools and few components are delivered to the construction site.

Fig.1

eine Seitenansicht einer ersten nicht erfindungsgemäßen Variante einer Vorrichtung zum Aufbringen einer Folie;

Fig.2

die in Figur 1 gezeigte Vorrichtung in einer perspektivischen Darstellung;

Fig.3

die in Figur 2 gezeigte Vorrichtung nach dem Entfernen einer Folienrolle;

Fig.4

eine Detaildarstellung zu Figur 2;

Fig.5

eine Detaildarstellung zu Figur 3;

Fig.6

eine perspektivische Darstellung einer zweiten nicht erfindungsgemäßen Variante einer Vorrichtung zum Aufbringen einer Folie mit einer zusätzlichen angetriebenen Aufwickelrolle;

Fig.7

die in Figur 6 gezeigte Vorrichtung nach dem Entfernen der Folienrolle und der Aufwickelrolle;

Fig.8

eine Detaildarstellung zu Figur 6;

Fig.9

eine Seitenansicht der in den Figur 6 bis 8 gezeigten Vorrichtung;

Fig.10

eine Explosionsdarstellung einer Aufwickelrolle;

Fig.11

eine nicht erfindungsgemäße Variante der Vorrichtung mit einer Abwickelrolle, einer Anpressrolle und einer durch Bodenkontakt reibschlüssig antreibbaren Aufwickelrolle;

Fig.12

eine Prinzipdarstellung der in der Figur 11 gezeigten Vorrichtung

Fig.13

eine Seitenansicht der in der Figur 11 gezeigten Vorrichtung mit einem Stützelement in einer Nichtgebrauchsstellung;

Fig.14

eine Seitenansicht der in der Figur 13 gezeigten Vorrichtung mit einem Stützelement in einer Gebrauchsstellung;

Fig.15

eine Detaildarstellung der in der Figur 11 gezeigten Vorrichtung mit einer eine Drehsperre aufweisenden Hülsenaufnahme sowie einer Spannvorrichtung;

Fig.16

eine Detaildarstellung der in der Figur 11 gezeigten Spannvorrichtung;

Fig.17

eine erfindungsgemäße Variante der Vorrichtung mit einer vor der Abwickelrolle reibschlüssig antreibbaren Aufwickelrolle zu Beginn der Abwicklung;

Fig.18

die in der Figur 17 gezeigte Vorrichtung gegen Ende der Abwicklung;

Fig.19

eine Detaildarstellung der in den Figuren 17 und 18 gezeigten Vorrichtung mit einer eine Drehsperre aufweisenden Hülsenaufnahme sowie einer Spannvorrichtung.

The invention allows for various embodiments. To further clarify its basic principle, one of them is shown in the drawing and will be described below. This shows in

Fig.1

a side view of a first non-inventive variant of a device for applying a film;

Fig.2

in the FIG. 1 shown device in a perspective view;

Figure 3

in the FIG. 2 apparatus shown after removing a film roll;

Figure 4

a detailed view too FIG. 2 ;

Figure 5

a detailed view too FIG. 3 ;

Figure 6

a perspective view of a second non-inventive variant of a device for applying a film with an additional driven take-up reel;

Figure 7

in the FIG. 6 apparatus shown after removing the film roll and the take-up roll;

Figure 8

a detailed view too FIG. 6 ;

Figure 9

a side view of the in the FIGS. 6 to 8 shown device;

Figure 10

an exploded view of a take-up roll;

Figure 11

a not inventive variant of the device with a take-off roll, a pressure roller and a frictionally driven by ground contact take-up reel;

Figure 12

a schematic representation of the in the FIG. 11 shown device

Figure 13

a side view of the in the FIG. 11 shown device with a support member in a non-use position;

Figure 14

a side view of the in the FIG. 13 shown device with a support member in a position of use;

Figure 15

a detail of the in the FIG. 11 shown device with a turnstile having sleeve receptacle and a clamping device;

Figure 16

a detail of the in the FIG. 11 shown clamping device;

Figure 17

a variant of the invention according to the invention with a front of the unwinding frictionally driven take-up reel at the beginning of the settlement;

Figure 18

the in the FIG. 17 shown device towards the end of the transaction;

Figure 19

a detailed view of the in the FIGS. 17 and 18 shown device with a turnstile having sleeve receptacle and a clamping device.

A first variant of a manually operable device 1, referred to as a hand applicator, for applying a film 2 as a structural seal to a roof surface 3 is described below with reference to FIG FIGS. 1 to 5 explained in more detail. As can be seen, the device 1 has a bracket 4 for manual guidance of the device 1, which is connected to a bottom-near receptacle 5. The receptacle 5 carries a rotatably arranged, the winding of the film 2 receiving film roll 6, which is positioned at a small distance from the roof surface 3. A first, also as a guide roller for aligning the film 2 specific pressure roller 8 and a further pressure roller 7 are used to transfer a contact pressure on the already applied on the roof surface film 2 in the feed direction V in front of and behind the film roll. 6

As in FIG. 5 and 10 recognizable, the film roll 6 is held by sleeve receptacle 24 with a sleeve-shaped film roll non-positively fixing clamping flange 22, which in turn are fixed by a spindle designed as a plug axis 9 releasably on the receptacle 5, wherein the axis 9 is fixed in the working position by a clamping bolt 10.

In the feed direction V of the device 1 in front of the film roll 6, a cleaning unit 11 with two parallel cleaning lips 12 is arranged, which are each biased by a spring element 13 with a biasing force F against the roof surface 3. In order to enable a problem-free separation of a protective film, not shown, of the self-adhesive film 2 in use of the device 1, this is led away from the processing zone by a guide 14 designed as a film guide ring.

The laying of the film 2, even with large Ausrolllängen of up to 100 m can be done as straight as possible, since the rolling of the film 3 corrections can be easily made by the simple handling of the wide bracket 4. This results in larger roof areas 3 also to a saving in the amount of the films used 2, because compliance with the prescribed overlap width of adjacent webs of the film 3 can be met more precisely.

A second variant of a device 15 is described below with reference to FIGS. 6 to 10 described. The basic structure of this variant corresponds to that in FIGS. 1 to 5 In particular, this also has the winding of the film 2 bearing, on a side plate guide designed as a receptacle 16 releasably arranged film rolls 6 and the pressure rollers 7 and 8 for transmitting the contact pressure on the film 2 with respect to the roof surface 3. On the other hand, the film roll 6 has a greater distance from the roof surface 3. The guide is provided with a removable take-up roll 17 for the to be separated from the film 2 before applying to the roof surface 3 protective film, which is arranged parallel to the film roll 6. At the beginning of the sticking process, a front edge portion of the protective film is applied to the cardboard tube of the take-up roll 17 accommodated by a take-up shaft and fixed by an adhesive bond.

In order to ensure a sufficient winding tension, the rotational movement during unwinding of the film roll 6 is transmitted to the take-up roll 17 by means of a force transmission element 18, which is adjustable, for example, in frictional force, and is designed as a drive belt and pulleys 19, 20 of different sizes. Regardless of the diameter of the unwinding film roll 6, the necessary Aufwickelspannung is always maintained, being made possible by the means of a tension roller 23 adjustable voltage of the power transmission element 18, a frictional force with slip between the speeds of the film roll 6 and the take-up roll 17. In particular, the transmission ratio of the pulleys 19, 20 between the film roll 6 and the take-up roll 17 is selected so that always a slight Aufwickelzug is ensured at the slipping take-up roll 17. As a result, the edge-straight winding is ensured. By the pressure rollers 7, 8, the applied film 2 is pressed. For this purpose, the pressure rollers 7, 8 a metallic or preferably a rubberized surface have and thus provide a full-surface pressure to ensure a much higher adhesive force of the film 2 on the roof surface 3.

As can be seen, the bracket 4 is pivotable in different working positions and fixed by means of a releasable locking pin 21 in a plurality of angular positions. The entire device 1, 15 can be assembled and disassembled in a few modules without tools. Thus, the transportation and installation on the roof surface 3 is quick and easy to carry out, which is a significant advantage of the development.

In the FIG. 11 a variant of the device 1 is shown in which the rear in the feed direction V pressure roller is also designed as a take-up roll 17. Due to the feed movement, the film 2 is applied by the film roll 6 on the roof surface 3 and fixed by means of the front pressure roller 8 on this. At the same time, the take-up roll 17 which is in operation on the previously applied film 2 is correspondingly set in rotation by the feed movement. The withdrawn from the film 2 before application to the roof surface 3 protective film 25 is thereby wound on the circumference of the take-up roll 17. Thus, the circumference of the film roll 6 decreases steadily in the course of use, while conversely, the circumference of the take-up roll 17 increases in a corresponding ratio and thus decreases the speed. By thus the film roll 6 and the take-up roll 17 are not coupled with a fixed speed ratio, but only path-dependent or path-controlled takes the take-up roll 17 always the required amount of the peeled protective film 25, without causing a slack. It has been found to be particularly advantageous for the operation when the minimum diameter of the film roll 6 is greater than the diameter of the take-up roll 17 at completely unwound film 2. To avoid unwanted impurities, the device 1 is equipped with the cleaning unit 11 through which Attachments and fluid retention before the pressure roller 8 are removed.

Complementary in the FIG. 12 nor to clarify the principle of changing during operation diameter of the take-up roll 17 shown. Starting from a minimum diameter corresponding to the bare take-up sleeve 26, the circumference of the take-up roll 17 increases steadily, whereby the axis of rotation also moves upwards. Thus, the speed decreases and is determined solely by the feed movement of the device 1 and the thus coupled deduction amount of the film 2 of the film roll 6. The simultaneously reduced diameter of the film roll 6 is not shown for simplicity. In the FIGS. 13 and 14 an adjustable support member 27 of the device 1 is shown in different positions. In the in the FIG. 13 illustrated non-use position, this has a distance to the roof surface 3, while in the in the FIG. 14 shown, pivoted position of use, the support member 27 abuts against the roof surface 3 and thereby at the same time the take-up roller 17 is relieved. In this position, the device 1 can be easily moved against the feed direction V.

For this purpose, the device 1 is additionally provided with a in the FIG. 15 shown turnstile 28 equipped as a freewheel, so that an unintentional, leading to a tapeless reverse rotation is avoided. In addition, the winding roller is a tensioning device 29 for correcting and increasing the wrinkle-free tension in the FIG. 11 shown protective film 25 on the take-up roll 17 assigned. By means of a rotary lever 32 and frictionally against each other can be applied bevel gears 33 so a manual rotational movement of the take-up reel 17 for tensioning the protective film 25 can be achieved.

At one in the FIGS. 17 and 18 shown variant of a device 30 according to the invention, the take-up roll 17 is on the upper side against the periphery of the film roll 6, so that the rotational movement of the film roll 6 is transmitted directly to the take-up roll 17. In a corresponding relation to the increasing circumference of the winding roller 17 and decreasing circumference of the film roll 6, the speed ratio also changes. In a surprisingly simple manner, however, the length of the film 2 unwound from the film roll 6 always corresponds to the length of the length of the protective film 25 wound on the take-up roll 17. The associated change in the spacing A, a of the axes of rotation of the film roll 6 and take-up roll 17 is determined by a Adjusting movement in the Z direction by means of a spring-supported guide carriage 31 balanced.
As already on the basis of the device 1 in the FIGS. 15 and 16 also shown is the device 30 as in the FIG. 18 to recognize with a turnstile 28 having sleeve receptacle for the take-up sleeve 26 and a clamping device 29 equipped.

LIST OF REFERENCE NUMBERS

1

device

2

foil

3

roof

4

hanger

5

admission

6

film roll

7

pressure roller

8th

pressure roller

9

axis

10

clamping bolts

11

cleaning unit

12

cleaning lip

13

spring element

14

guide

15

device

16

admission

17

up roll

18

Power transmission element

19

pulley

20

pulley

21

locking pin

22

clamping flange

23

idler

24

sleeve receiving

25

protector

26

Reeling drum

27

support element

28

turnstile

29

jig

30

device

31

guide carriage

32

lever

33

bevel gear

A, a

distance

V

feed direction

F

preload force

Claims (12)

1. Manually actuatable device (1, 15, 30) for applying a self-adhesive sheet (2) as structural seal to an in particular horizontal roof surface (3) or building surface, having a sheet roller (6), which carries a wrapping of the sheet (2) and is releasably connected to a receptacle (5, 16), and having at least one press-on roller (7, 8) which is arranged upstream of the sheet roller (6) in the advancing direction (V) and intended for transmitting a press-on force to the sheet (2) applied to the roof surface (3) or the building surface, wherein the device (1, 15, 30) has a winding-up roller (17) for the protective film which is to be separated from the sheet (2) prior to the application to the roof surface (3) or building surface, and the winding-up roller (17) can be driven in a rotationally movable manner during the advancing movement of the device (1, 15, 30), characterized in that the sheet roller (6) and the winding-up roller (17) bear circumferentially against one another, with the result that the rotary movement of the sheet roller (6) is transmitted directly to the winding-up roller (17) by a direct frictional engagement between the variable circumference of the sheet roller (6) and the variable circumference of the winding-up roller (17), and, during the advancing movement of the device (1, 15, 30), the winding-up roller (17) can be driven in a rotationally movable manner with a variable constantly changing ratio of the advancing speed to the rotational speed of the winding-up roller (17) in that, on account of the advancing movement of the device (1, 15) relative to the roof surface (3) or building surface, the winding-up roller (17) can be driven in a rotationally movable manner, in dependence on the advancing travel of the device (1, 15), with a constantly decreasing rotational speed ratio between the advancing rate and the rotational speed of the winding-up roller (17).
2. Device (1, 15, 30) according to Claim 1, characterized in that the winding-up roller (17) lies on the roof surface (3) or building surface or is pretensioned with respect to the sheet roller (6), with the result that the winding-up roller (17) can be driven in a rotationally movable manner on account of the advancing movement of the device (1, 15, 30).
3. Device (1, 15, 30) according to at least one of the preceding claims, characterized in that the winding-up roller (17) lies circumferentially on the roof surface (3) or building surface with the wrapping of the protective film (25).
4. Device (1, 15, 30) according to at least one of the preceding claims, characterized in that the device (1, 15, 30) has a tensioning device (29) for setting, in particular increasing, the pretensioning of the protective film (25) on the winding-up roller (17).
5. Device (1) according to at least one of the preceding claims, characterized in that the device (1) has a supporting element (27) which is movable between a use position and a non-use position, in particular with a supporting roller for temporarily interrupting the ground contact of the press-on roller (7, 8) and/or the winding-up roller (17) with respect to the roof surface (3) or building surface.
6. Device (1, 15, 30) according to at least one of the preceding claims, characterized in that the winding-up roller (17) has a rotational lock (28), in particular a freewheel mechanism, by means of which a rotational movement of the winding-up roller (17) is interrupted or blocked during a movement of the device (1, 15) counter to the advancing direction (V).
7. Device (1, 15, 30) according to at least one of the preceding claims, characterized in that the press-on roller (7, 8), the sheet roller (6) and/or the winding-up roller (17) have or has, circumferentially, an elastic layer, in particular a rubber coating.
8. Device (1, 15, 30) according to at least one of the preceding claims, characterized in that the sheet roller (6) and/or the winding-up roller (17) are or is rotatably mounted by means of an axle (9) and/or sleeve receptacle (24) fixed releasably on the receptacle (5, 16).
9. Device (1, 15, 30) according to at least one of the preceding claims, characterized in that a cleaning unit (11) comprising at least one cleaning lip (12) is arranged upstream of the sheet roller (6) in the advancing direction (V) of the device (1, 15).
10. Device (1, 15, 30) according to at least one of the preceding claims, characterized in that the distance of the sheet roller (6) from the roof surface (3) or the building surface is less than the diameter of the sheet roller (6).
11. Device (1, 15, 30) according to at least one of the preceding claims, characterized in that the diameter of the sheet roller (6) is greater than the diameter of the winding-up roller (17).
12. Device (1, 15, 30) according to at least one of the preceding claims, characterized in that the device (1, 15) is configured so as to be movable manually on the roof surface (3) or the building surface by means of a U-frame (4) which can be locked in particular in different working positions.

Images